format of graphical representation of the sound (music, human voice, etc.); in other words, it is the 2D audio barcode (by analogy with the QR-code);

real-time PhonoPaper-code reader (using the camera);

PhonoPaper-code generator (sound to image converter).

Key features:

PhonoPaper-code is analogue, so it is not so sensitive to different types of the image distortion (bad camera, dark picture, wrinkled paper, etc.);
at least you will hear the "silhouette" of the original sound;

PhonoPaper does not require access to the network; its code is self-contained;

PhonoPaper-code can be played in real-time with hand-controlled speed and direction;

PhonoPaper-code can be drawn by hand (paper version of the Virtual ANS synth);